RU34906U1 - DC Rail Power Supply System - Google Patents

Abstract

A power supply system for direct current railways, comprising a main rectifier unit, a booster transformer powered from traction substation AC buses, a contact network, a running rail, a converter, the outputs of the main rectifying unit and a converter being connected to a contact network and a running rail, characterized in that it is equipped with a three-phase line of increased AC voltage, to which the leads of the secondary winding of the boost transformer and the inputs of -forming, wherein the converter comprises a transformer, whose primary winding terminals are inputs to the inverter and the terminals of the secondary winding connected to inputs of the controlled rectifier, whose output is the transmitter output.

Description

DC SYSTEM OF ELECTRICITY OF RAILWAYS OF DC

A useful model refers to the electrification of railways.

A known power supply system for direct current railways, comprising a contact suspension connected in parallel with a three-phase current distribution network through three-phase chokes with zero outputs (USSR author's certificate No. 366995, V60MZ / 02, H02J3 / 02, bull. No. 8, 01/23/1973).

However, such a power supply system has low reliability due to possible phase failure or non-symmetry in three-phase chokes.

The closest analogue of the utility model is a direct current railway power supply system containing the main and boost rectifier units, high voltage direct current wire, contact network, running rail and a pulse converter (USSR author's certificate No. 488736, V60MZ / 00, bull. No. 39 10/25/1975).

In this power supply system, boost boost controlled rectifier converters are installed to obtain an increased voltage of 6.6 kV DC and transfer energy through an additional wire to the inter-substation zone.

20-,:

MPKV60MZ / 00 there is a decrease in the level of stress on the current collector of the mobile

composition, which leads to a decrease in the speed of trains and an increase in energy losses in power supply devices. This power supply system has low bandwidth and low reliability due to the absence of galvanic isolation between the longitudinal line of 6.6 kV and the traction network of 3.3 kV.

The objective of the utility model is to increase the reliability and throughput of the power supply system of direct current railways by increasing the speed of trains and reducing energy losses.

The problem is solved in that the power supply system of direct current railways, containing the main rectifier unit, booster transformer powered from traction substation AC buses, a contact network, a running rail, a converter, and the outputs of the main rectifier unit and converter are connected to the contact network and running rail, equipped with a three-phase line of increased AC voltage, to which the leads of the secondary winding of the boost booster transformer are connected and the inputs of the converter, the converter comprising a transformer whose primary windings are the inputs of the converter, and the secondary windings are connected to the inputs of a controlled rectifier, the outputs of which are the outputs of the converter. The power supply system of direct current railways contains

booster transformer 1, the terminals of the secondary winding of which are connected to a three-phase line of high voltage AC 2, contact network 3, converter 4, running rail 5, load (electric locomotive) 6, the main rectifier unit 7 (A. Burkov Electronic equipment and converters: Textbook for high schools railway transport-M .: Transport, 2001 - p. 291), the inputs of the converter 4 are connected to three-phase lines of high voltage AC 35 kV 2, and the outputs of the converter 4 and the main rectifier unit 7 are connected to contact th network 3 and the running rail 5, the converter 4 contains a transformer 8, the terminals of the primary winding of which are the inputs of the converter, and the terminals of the secondary winding of the transformer 8 are connected to the inputs of a controlled rectifier 9 (Burkov A.T. Electronic equipment and converters: Textbook for high schools .-d. transport-M: Transport, 2001 - p. 404), the outputs of which are the outputs of the converter 4 The power supply system of direct current railways works as follows: load 6 is drained in traction mode; it is carried out via the contact network 3 and along a three-phase line of increased AC voltage 2 through a converter 4. By changing the control angle of the thyristors of the controlled rectifier 9, it is possible to provide a stable voltage in the contact network 3 at the points of connection of the converters 4.

Mo5ims

3 In this case, converter 4 closest to

load 6.

In the case of the inverter mode of converter 4, excess recovery energy can be transmitted via a three-phase line of increased voltage 2 and through a contact network 3 to the main rectifying unit 7 of the traction substation or to the converters 4 located in the neighboring inter-substation zone for consumption by trains. In this case, the inverter 4 is transferred to the inverter 4, closest to the regenerative electric locomotive 6,

The proposed power supply system allows you to realize the required speed, reduce energy losses and improve the safety of operation of the DC power supply system.

Claims (1)

A power supply system for direct current railways, comprising a main rectifier unit, a booster transformer powered from traction substation AC buses, a contact network, a running rail, a converter, the outputs of the main rectifying unit and a converter being connected to a contact network and a running rail, characterized in that it is equipped with a three-phase line of increased AC voltage, to which the leads of the secondary winding of the boost transformer and the inputs of -forming, wherein the converter comprises a transformer, whose primary winding terminals are inputs to the inverter and the terminals of the secondary winding connected to inputs of the controlled rectifier, whose output is the transmitter output.